The sysnthesis and characterization of two series of chiral mononuclear palladium(II) azocompounds, (LN (n))Pd(acac)], prepared by bridge splitting reactions or the dinuclear parents (Pd[LN (n)]μ-Cl))2 with thallium acetylacetonate are reported. All the complexes, bearing a stereogenic centre in the alkoxy lateral chain (R*O = R-(−)-2-octyl; S-(−)-β-citronellyl), are mesomorphic. Their thermotropic behaviour has been investigated by differential scanning calorimetry, optical microscopy and X-ray diffraction. Worthy of note, the clearing temperatures of all the compounds are below 70°C. The relationship between ligands, μ-Cl dimers and mononuclear acetylacetonate complexes is discussed.
Transitions metals complexed in ordered mesophases XV. Synthesis, characterization and mesomorphic properties of new potentially ferroelectric liquid crystals: Acetylacetonate p,p' -dialoxyazobenzene mononuclear palladium(II) complexes / M., Ghedini; D., Pucci; E., Cesarotti; Francescangeli, Oriano; R., Bartolino. - In: LIQUID CRYSTALS. - ISSN 0267-8292. - 16 (3):(1994), pp. 373-380. [10.1080/02678299408029162]
Transitions metals complexed in ordered mesophases XV. Synthesis, characterization and mesomorphic properties of new potentially ferroelectric liquid crystals: Acetylacetonate p,p' -dialoxyazobenzene mononuclear palladium(II) complexes
FRANCESCANGELI, ORIANO;
1994-01-01
Abstract
The sysnthesis and characterization of two series of chiral mononuclear palladium(II) azocompounds, (LN (n))Pd(acac)], prepared by bridge splitting reactions or the dinuclear parents (Pd[LN (n)]μ-Cl))2 with thallium acetylacetonate are reported. All the complexes, bearing a stereogenic centre in the alkoxy lateral chain (R*O = R-(−)-2-octyl; S-(−)-β-citronellyl), are mesomorphic. Their thermotropic behaviour has been investigated by differential scanning calorimetry, optical microscopy and X-ray diffraction. Worthy of note, the clearing temperatures of all the compounds are below 70°C. The relationship between ligands, μ-Cl dimers and mononuclear acetylacetonate complexes is discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
